From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753708AbYCQQeh (ORCPT ); Mon, 17 Mar 2008 12:34:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751740AbYCQQe3 (ORCPT ); Mon, 17 Mar 2008 12:34:29 -0400 Received: from g4t0016.houston.hp.com ([15.201.24.19]:19544 "EHLO g4t0016.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751407AbYCQQe3 (ORCPT ); Mon, 17 Mar 2008 12:34:29 -0400 Message-ID: <47DE9D8F.8050402@hp.com> Date: Mon, 17 Mar 2008 12:34:23 -0400 From: "Alan D. Brunelle" User-Agent: Thunderbird 2.0.0.12 (X11/20080227) MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Cc: Jens Axboe , npiggin@suse.de, dgc@sgi.com Subject: [PATCH (block.git) 0/2] IO CPU affinity update: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Jens - Two patches: 1. Adds in the IRQ saving to generic_smp_call_function_single_interrupt (as you had suggested). 2. Ensures a single IPI generated to get a remote function call handler going. So far it is working better than before on the 4-way IA64 w/ the mkfs/untar/make test suite - after 22 runs: Part RQ MIN AVG MAX Dev ----- -- ------ ------ ------ ------ mkfs 0 18.786 19.253 19.655 0.241 mkfs 1 18.639 19.182 19.786 0.293 untar 0 17.140 17.486 18.250 0.322 untar 1 16.951 17.494 18.274 0.350 make 0 22.927 24.310 34.339 2.287 make 1 22.863 23.788 24.189 0.333 comb 0 59.478 61.049 70.320 2.142 comb 1 59.875 60.463 61.305 0.458 psys 0 3.96% 4.14% 4.39% 0.100 psys 1 3.60% 3.85% 4.19% 0.176 So we're seeing reduced time (~1.0%) and reduced %sys to do it (7.0%). The tighter deviations for make with rq=1 may be interesting... :-) I've compiled & booted the patches for x86_64 - rq=1 is working on that platform too. Alan